Newcastle United are a perfect example of how a proper scouting system on the continent can reap massive rewards.

Bleacher Report's Mikhail Turner has taken a look at some of Manchester United's primary transfer targets, all of whom are sure to have fans excited. However, players will need to leave Old Trafford to make way for the team's summer signings.

Here is a look at six players who United should purge from the club's books this summer.

Jonny Evans

Mike Hewitt/Getty ImagesJonny Evans has never been able to fulfill his potential at Manchester United

There was a time when transfer gossip had Barcelona interested in signing Jonny Evans. That seems outlandish now.

It is not that Evans is awful, but he was supposed to be so much better. For whatever reason, his development has leveled off.

With five centre-backs on the payroll, Ferguson will probably let one leave. Phil Jones and Chris Smalling are the defensive partnership of the future, and both offer versatility, so they are not going anywhere.

Nemanja Vidic seems to constantly be linked with a move away from Old Trafford, while Rio Ferdinand will continue to see a reduced role.

It is Evans, though, who should be shown the exit. Not only could he fetch a decent price in the transfer market but losing Evans would not be a significant loss of Ferguson should the other four remain at United.

Anderson

Michael Regan/Getty ImagesInjuries have prevented Anderson from having a bigger role at Manchester United

Anderson could be the difference maker in the Manchester United midfield. He has shown glimpses and flashes of being an excellent player.

He also can never seem to stay healthy when he is playing well. Anderson has basically become another Owen Hargreaves.

Ferguson is going to revamp his midfield this summer, and it is hard to see where Anderson is going to fit into these plans. If a team is willing to pay for the Brazilian, United would be foolish not to accept it.

There is the risk that he manages to stay healthy somewhere else, but these is also a real possibility that he is nothing more than a midfield version of Jonathan Woodgate.